都市キャノピー層内局所花粉量に対する花粉再飛散の影響の数値シミュレーション

抄録

The Japanese cedar pollinosis is a very serious problem in Japan. In particular, in the Tokyo metropolitan area, a survey reports that the prevalence rate in the 0 - 14 years age group became more than 10 times during the recent 20 years. We are concerned that the urban environment promotes the pollen re-transport and exposure. Therefore, we discuss the possibility that the re-transport of fallen pollen from building roofs increases the concentration of atmospheric pollen. We measured the amount of the cedar pollen on each height of the urban canopy layer by using Durham samplers, and calculated under the conditions with and without pollen re-transport. These measured and calculated results are compared to confirm the influence of the re-transport in the urban environment.